code: def test_where_cast_str(self, simple_index):
      index = simple_index
  
      mask = np.ones(len(index), dtype=bool)
      mask[-1] = False
  
      result = index.where(mask, str(index[0]))
      expected = index.where(mask, index[0])
      tm.assert_index_equal(result, expected)
  
      result = index.where(mask, [str(index[0])])
      tm.assert_index_equal(result, expected)
  
      expected = index.astype(object).where(mask, "foo")
      result = index.where(mask, "foo")
      tm.assert_index_equal(result, expected)
  
      result = index.where(mask, ["foo"])
      tm.assert_index_equal(result, expected)
  
file_path: pandas/pandas/tests/indexes/test_datetimelike.py
imports: import numpy
  import pytest
  import pandas
  import pandas._testing
label_desc: Use image node_id 12 for calling the TestDatetimeLike obj's underlying member method code with example usage: obj.test_where_cast_str(simple_index) without return types